title: Water types and their relaxation behavior in partially rehydrated CaFe-mixed binary oxide obtained from CaFe-layered double hydroxide in the 155-298 K temperature range.
abstract: Heat-treated CaFe-layered double hydroxide samples were equilibrated under conditions of various relative humidities (11%, 43% and 75%). Measurements by FT-IR and dielectric relaxation spectroscopies revealed that partial to full reconstruction of the layered structure took place. Water types taking part in the reconstruction process were identified via dielectric relaxation measurements either at 298 K or on the flash-cooled (to 155 K) samples. The dynamics of water molecules at the various positions was also studied by this method, allowing the flash-cooled samples to warm up to 298 K.
authors.affiliation: Department of Applied and Environmental Chemistry, University of Szeged , Rerrich tér 1, Szeged, H-6720 Hungary.
authors.forename: Valéria
authors.initials: V
authors.lastname: Bugris
authors.forename: Henrik
authors.initials: H
authors.lastname: Haspel
authors.forename: Ákos
authors.initials: Á
authors.lastname: Kukovecz
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Kónya
authors.forename: Mónika
authors.initials: M
authors.lastname: Sipiczki
authors.forename: Pál
authors.initials: P
authors.lastname: Sipos
authors.forename: István
authors.initials: I
authors.lastname: Pálinkó